I have a SS Rev 2 that I fly with a 2009 LF bar with the CPR upgrade kit installed as the 09 LF safety system was complete shit. This combo works very well.

I also use another shorter LF bar with a Best Guroo 3M for teaching my daughter. This is not the most stable setup when unhooked (transferring the kite to her harness after I have it in the air), but she is not using it unhooked anyway, so no major issues there.

From what I can tell, as long as the flag line(s) are the same (i.e. release to both fronts as a mini 5th or a single front), I don't think there are too many issues with swapping around. I happen to like the LF CPR bars. The below the bar depower is not too bad on the latest generations. I have never had the trim line stick in the cleat so tightly that I could not depower the kite when flying at zenith.

The NORTH 4 line bar with mini 5th works perfectly with the Blade Trigger kites (long attachments - 12m, short attachments 9m)This is great, as the Triggers are fantastic kites, but the Blade Bar sucks...

Loved my 14M SS rally but wasn't thrilled w/the bar. Started using an Ozone Zephyr bar & made a kite I love into my 1st love, best sex ever kite.

I know a lot of people like the comp stick but I didn't like trying to get the trim line pulled when I needed it. I'm sure it's just something to get used to but the ozone setup is so much simpler & easier to get at(for me). Also this winter when snow kiting SS's white lines suck. Colored lines!! Had to add a set of pigtails to make it work.